196518518SPatrick McHardy #ifndef _NET_NF_TABLES_H 296518518SPatrick McHardy #define _NET_NF_TABLES_H 396518518SPatrick McHardy 40b2d8a7bSPatrick McHardy #include <linux/module.h> 596518518SPatrick McHardy #include <linux/list.h> 696518518SPatrick McHardy #include <linux/netfilter.h> 767a8fc27SPatrick McHardy #include <linux/netfilter/nfnetlink.h> 80ca743a5SPablo Neira Ayuso #include <linux/netfilter/x_tables.h> 996518518SPatrick McHardy #include <linux/netfilter/nf_tables.h> 10ce355e20SEric Dumazet #include <linux/u64_stats_sync.h> 1196518518SPatrick McHardy #include <net/netlink.h> 1296518518SPatrick McHardy 1320a69341SPatrick McHardy #define NFT_JUMP_STACK_SIZE 16 1420a69341SPatrick McHardy 1596518518SPatrick McHardy struct nft_pktinfo { 1696518518SPatrick McHardy struct sk_buff *skb; 17beac5afaSPablo Neira Ayuso bool tprot_set; 184566bf27SPatrick McHardy u8 tprot; 190ca743a5SPablo Neira Ayuso /* for x_tables compatibility */ 200ca743a5SPablo Neira Ayuso struct xt_action_param xt; 2196518518SPatrick McHardy }; 2296518518SPatrick McHardy 230e5a1c7eSPablo Neira Ayuso static inline struct net *nft_net(const struct nft_pktinfo *pkt) 240e5a1c7eSPablo Neira Ayuso { 250e5a1c7eSPablo Neira Ayuso return pkt->xt.state->net; 260e5a1c7eSPablo Neira Ayuso } 270e5a1c7eSPablo Neira Ayuso 280e5a1c7eSPablo Neira Ayuso static inline unsigned int nft_hook(const struct nft_pktinfo *pkt) 290e5a1c7eSPablo Neira Ayuso { 300e5a1c7eSPablo Neira Ayuso return pkt->xt.state->hook; 310e5a1c7eSPablo Neira Ayuso } 320e5a1c7eSPablo Neira Ayuso 330e5a1c7eSPablo Neira Ayuso static inline u8 nft_pf(const struct nft_pktinfo *pkt) 340e5a1c7eSPablo Neira Ayuso { 350e5a1c7eSPablo Neira Ayuso return pkt->xt.state->pf; 360e5a1c7eSPablo Neira Ayuso } 370e5a1c7eSPablo Neira Ayuso 380e5a1c7eSPablo Neira Ayuso static inline const struct net_device *nft_in(const struct nft_pktinfo *pkt) 390e5a1c7eSPablo Neira Ayuso { 400e5a1c7eSPablo Neira Ayuso return pkt->xt.state->in; 410e5a1c7eSPablo Neira Ayuso } 420e5a1c7eSPablo Neira Ayuso 430e5a1c7eSPablo Neira Ayuso static inline const struct net_device *nft_out(const struct nft_pktinfo *pkt) 440e5a1c7eSPablo Neira Ayuso { 450e5a1c7eSPablo Neira Ayuso return pkt->xt.state->out; 460e5a1c7eSPablo Neira Ayuso } 470e5a1c7eSPablo Neira Ayuso 480ca743a5SPablo Neira Ayuso static inline void nft_set_pktinfo(struct nft_pktinfo *pkt, 490ca743a5SPablo Neira Ayuso struct sk_buff *skb, 50073bfd56SDavid S. Miller const struct nf_hook_state *state) 510ca743a5SPablo Neira Ayuso { 520ca743a5SPablo Neira Ayuso pkt->skb = skb; 53613dbd95SPablo Neira Ayuso pkt->xt.state = state; 540ca743a5SPablo Neira Ayuso } 550ca743a5SPablo Neira Ayuso 56beac5afaSPablo Neira Ayuso static inline void nft_set_pktinfo_proto_unspec(struct nft_pktinfo *pkt, 57beac5afaSPablo Neira Ayuso struct sk_buff *skb) 58beac5afaSPablo Neira Ayuso { 59beac5afaSPablo Neira Ayuso pkt->tprot_set = false; 60beac5afaSPablo Neira Ayuso pkt->tprot = 0; 61beac5afaSPablo Neira Ayuso pkt->xt.thoff = 0; 62beac5afaSPablo Neira Ayuso pkt->xt.fragoff = 0; 63beac5afaSPablo Neira Ayuso } 64beac5afaSPablo Neira Ayuso 65beac5afaSPablo Neira Ayuso static inline void nft_set_pktinfo_unspec(struct nft_pktinfo *pkt, 66beac5afaSPablo Neira Ayuso struct sk_buff *skb, 67beac5afaSPablo Neira Ayuso const struct nf_hook_state *state) 68beac5afaSPablo Neira Ayuso { 69beac5afaSPablo Neira Ayuso nft_set_pktinfo(pkt, skb, state); 70beac5afaSPablo Neira Ayuso nft_set_pktinfo_proto_unspec(pkt, skb); 71beac5afaSPablo Neira Ayuso } 72beac5afaSPablo Neira Ayuso 73a55e22e9SPatrick McHardy /** 74a55e22e9SPatrick McHardy * struct nft_verdict - nf_tables verdict 75a55e22e9SPatrick McHardy * 76a55e22e9SPatrick McHardy * @code: nf_tables/netfilter verdict code 77a55e22e9SPatrick McHardy * @chain: destination chain for NFT_JUMP/NFT_GOTO 78a55e22e9SPatrick McHardy */ 79a55e22e9SPatrick McHardy struct nft_verdict { 80a55e22e9SPatrick McHardy u32 code; 81a55e22e9SPatrick McHardy struct nft_chain *chain; 82a55e22e9SPatrick McHardy }; 83a55e22e9SPatrick McHardy 8496518518SPatrick McHardy struct nft_data { 8596518518SPatrick McHardy union { 8696518518SPatrick McHardy u32 data[4]; 871ca2e170SPatrick McHardy struct nft_verdict verdict; 8896518518SPatrick McHardy }; 8996518518SPatrick McHardy } __attribute__((aligned(__alignof__(u64)))); 9096518518SPatrick McHardy 91a55e22e9SPatrick McHardy /** 92a55e22e9SPatrick McHardy * struct nft_regs - nf_tables register set 93a55e22e9SPatrick McHardy * 94a55e22e9SPatrick McHardy * @data: data registers 95a55e22e9SPatrick McHardy * @verdict: verdict register 96a55e22e9SPatrick McHardy * 97a55e22e9SPatrick McHardy * The first four data registers alias to the verdict register. 98a55e22e9SPatrick McHardy */ 99a55e22e9SPatrick McHardy struct nft_regs { 100a55e22e9SPatrick McHardy union { 10149499c3eSPatrick McHardy u32 data[20]; 102a55e22e9SPatrick McHardy struct nft_verdict verdict; 103a55e22e9SPatrick McHardy }; 104a55e22e9SPatrick McHardy }; 105a55e22e9SPatrick McHardy 10610596608SLiping Zhang /* Store/load an u16 or u8 integer to/from the u32 data register. 10710596608SLiping Zhang * 10810596608SLiping Zhang * Note, when using concatenations, register allocation happens at 32-bit 10910596608SLiping Zhang * level. So for store instruction, pad the rest part with zero to avoid 11010596608SLiping Zhang * garbage values. 11110596608SLiping Zhang */ 11210596608SLiping Zhang 11310596608SLiping Zhang static inline void nft_reg_store16(u32 *dreg, u16 val) 11410596608SLiping Zhang { 11510596608SLiping Zhang *dreg = 0; 11610596608SLiping Zhang *(u16 *)dreg = val; 11710596608SLiping Zhang } 11810596608SLiping Zhang 11910596608SLiping Zhang static inline void nft_reg_store8(u32 *dreg, u8 val) 12010596608SLiping Zhang { 12110596608SLiping Zhang *dreg = 0; 12210596608SLiping Zhang *(u8 *)dreg = val; 12310596608SLiping Zhang } 12410596608SLiping Zhang 12510596608SLiping Zhang static inline u16 nft_reg_load16(u32 *sreg) 12610596608SLiping Zhang { 12710596608SLiping Zhang return *(u16 *)sreg; 12810596608SLiping Zhang } 12910596608SLiping Zhang 13010596608SLiping Zhang static inline u8 nft_reg_load8(u32 *sreg) 13110596608SLiping Zhang { 13210596608SLiping Zhang return *(u8 *)sreg; 13310596608SLiping Zhang } 13410596608SLiping Zhang 13549499c3eSPatrick McHardy static inline void nft_data_copy(u32 *dst, const struct nft_data *src, 13649499c3eSPatrick McHardy unsigned int len) 13796518518SPatrick McHardy { 13849499c3eSPatrick McHardy memcpy(dst, src, len); 13996518518SPatrick McHardy } 14096518518SPatrick McHardy 14196518518SPatrick McHardy static inline void nft_data_debug(const struct nft_data *data) 14296518518SPatrick McHardy { 14396518518SPatrick McHardy pr_debug("data[0]=%x data[1]=%x data[2]=%x data[3]=%x\n", 14496518518SPatrick McHardy data->data[0], data->data[1], 14596518518SPatrick McHardy data->data[2], data->data[3]); 14696518518SPatrick McHardy } 14796518518SPatrick McHardy 14896518518SPatrick McHardy /** 14920a69341SPatrick McHardy * struct nft_ctx - nf_tables rule/set context 15096518518SPatrick McHardy * 15199633ab2SPablo Neira Ayuso * @net: net namespace 15296518518SPatrick McHardy * @afi: address family info 15396518518SPatrick McHardy * @table: the table the chain is contained in 15496518518SPatrick McHardy * @chain: the chain the rule is contained in 1550ca743a5SPablo Neira Ayuso * @nla: netlink attributes 156128ad332SPablo Neira Ayuso * @portid: netlink portID of the original message 157128ad332SPablo Neira Ayuso * @seq: netlink sequence number 158128ad332SPablo Neira Ayuso * @report: notify via unicast netlink message 15996518518SPatrick McHardy */ 16096518518SPatrick McHardy struct nft_ctx { 16199633ab2SPablo Neira Ayuso struct net *net; 1627c95f6d8SPablo Neira Ayuso struct nft_af_info *afi; 1637c95f6d8SPablo Neira Ayuso struct nft_table *table; 1647c95f6d8SPablo Neira Ayuso struct nft_chain *chain; 1650ca743a5SPablo Neira Ayuso const struct nlattr * const *nla; 166128ad332SPablo Neira Ayuso u32 portid; 167128ad332SPablo Neira Ayuso u32 seq; 168128ad332SPablo Neira Ayuso bool report; 16996518518SPatrick McHardy }; 17096518518SPatrick McHardy 17196518518SPatrick McHardy struct nft_data_desc { 17296518518SPatrick McHardy enum nft_data_types type; 17396518518SPatrick McHardy unsigned int len; 17496518518SPatrick McHardy }; 17596518518SPatrick McHardy 176d0a11fc3SPatrick McHardy int nft_data_init(const struct nft_ctx *ctx, 177d0a11fc3SPatrick McHardy struct nft_data *data, unsigned int size, 17896518518SPatrick McHardy struct nft_data_desc *desc, const struct nlattr *nla); 1795eccdfaaSJoe Perches void nft_data_uninit(const struct nft_data *data, enum nft_data_types type); 1805eccdfaaSJoe Perches int nft_data_dump(struct sk_buff *skb, int attr, const struct nft_data *data, 18196518518SPatrick McHardy enum nft_data_types type, unsigned int len); 18296518518SPatrick McHardy 18396518518SPatrick McHardy static inline enum nft_data_types nft_dreg_to_type(enum nft_registers reg) 18496518518SPatrick McHardy { 18596518518SPatrick McHardy return reg == NFT_REG_VERDICT ? NFT_DATA_VERDICT : NFT_DATA_VALUE; 18696518518SPatrick McHardy } 18796518518SPatrick McHardy 18820a69341SPatrick McHardy static inline enum nft_registers nft_type_to_reg(enum nft_data_types type) 18920a69341SPatrick McHardy { 190bf798657SPablo Neira Ayuso return type == NFT_DATA_VERDICT ? NFT_REG_VERDICT : NFT_REG_1 * NFT_REG_SIZE / NFT_REG32_SIZE; 19120a69341SPatrick McHardy } 19220a69341SPatrick McHardy 193f1d505bbSJohn W. Linville int nft_parse_u32_check(const struct nlattr *attr, int max, u32 *dest); 194b1c96ed3SPatrick McHardy unsigned int nft_parse_register(const struct nlattr *attr); 195b1c96ed3SPatrick McHardy int nft_dump_register(struct sk_buff *skb, unsigned int attr, unsigned int reg); 196b1c96ed3SPatrick McHardy 197d07db988SPatrick McHardy int nft_validate_register_load(enum nft_registers reg, unsigned int len); 1981ec10212SPatrick McHardy int nft_validate_register_store(const struct nft_ctx *ctx, 1991ec10212SPatrick McHardy enum nft_registers reg, 20096518518SPatrick McHardy const struct nft_data *data, 20145d9bcdaSPatrick McHardy enum nft_data_types type, unsigned int len); 20296518518SPatrick McHardy 20386f1ec32SPatrick McHardy /** 20486f1ec32SPatrick McHardy * struct nft_userdata - user defined data associated with an object 20586f1ec32SPatrick McHardy * 20686f1ec32SPatrick McHardy * @len: length of the data 20786f1ec32SPatrick McHardy * @data: content 20886f1ec32SPatrick McHardy * 20986f1ec32SPatrick McHardy * The presence of user data is indicated in an object specific fashion, 21086f1ec32SPatrick McHardy * so a length of zero can't occur and the value "len" indicates data 21186f1ec32SPatrick McHardy * of length len + 1. 21286f1ec32SPatrick McHardy */ 21386f1ec32SPatrick McHardy struct nft_userdata { 21486f1ec32SPatrick McHardy u8 len; 21586f1ec32SPatrick McHardy unsigned char data[0]; 21686f1ec32SPatrick McHardy }; 21786f1ec32SPatrick McHardy 21896518518SPatrick McHardy /** 21920a69341SPatrick McHardy * struct nft_set_elem - generic representation of set elements 22020a69341SPatrick McHardy * 22120a69341SPatrick McHardy * @key: element key 222fe2811ebSPatrick McHardy * @priv: element private data and extensions 22320a69341SPatrick McHardy */ 22420a69341SPatrick McHardy struct nft_set_elem { 2257d740264SPatrick McHardy union { 2267d740264SPatrick McHardy u32 buf[NFT_DATA_VALUE_MAXLEN / sizeof(u32)]; 2277d740264SPatrick McHardy struct nft_data val; 2287d740264SPatrick McHardy } key; 229fe2811ebSPatrick McHardy void *priv; 23020a69341SPatrick McHardy }; 23120a69341SPatrick McHardy 23220a69341SPatrick McHardy struct nft_set; 23320a69341SPatrick McHardy struct nft_set_iter { 2348588ac09SPablo Neira Ayuso u8 genmask; 23520a69341SPatrick McHardy unsigned int count; 23620a69341SPatrick McHardy unsigned int skip; 23720a69341SPatrick McHardy int err; 23820a69341SPatrick McHardy int (*fn)(const struct nft_ctx *ctx, 239de70185dSPablo Neira Ayuso struct nft_set *set, 24020a69341SPatrick McHardy const struct nft_set_iter *iter, 241de70185dSPablo Neira Ayuso struct nft_set_elem *elem); 24220a69341SPatrick McHardy }; 24320a69341SPatrick McHardy 24420a69341SPatrick McHardy /** 245c50b960cSPatrick McHardy * struct nft_set_desc - description of set elements 246c50b960cSPatrick McHardy * 247c50b960cSPatrick McHardy * @klen: key length 248c50b960cSPatrick McHardy * @dlen: data length 249c50b960cSPatrick McHardy * @size: number of set elements 250c50b960cSPatrick McHardy */ 251c50b960cSPatrick McHardy struct nft_set_desc { 252c50b960cSPatrick McHardy unsigned int klen; 253c50b960cSPatrick McHardy unsigned int dlen; 254c50b960cSPatrick McHardy unsigned int size; 255c50b960cSPatrick McHardy }; 256c50b960cSPatrick McHardy 257c50b960cSPatrick McHardy /** 258c50b960cSPatrick McHardy * enum nft_set_class - performance class 259c50b960cSPatrick McHardy * 260c50b960cSPatrick McHardy * @NFT_LOOKUP_O_1: constant, O(1) 261c50b960cSPatrick McHardy * @NFT_LOOKUP_O_LOG_N: logarithmic, O(log N) 262c50b960cSPatrick McHardy * @NFT_LOOKUP_O_N: linear, O(N) 263c50b960cSPatrick McHardy */ 264c50b960cSPatrick McHardy enum nft_set_class { 265c50b960cSPatrick McHardy NFT_SET_CLASS_O_1, 266c50b960cSPatrick McHardy NFT_SET_CLASS_O_LOG_N, 267c50b960cSPatrick McHardy NFT_SET_CLASS_O_N, 268c50b960cSPatrick McHardy }; 269c50b960cSPatrick McHardy 270c50b960cSPatrick McHardy /** 271c50b960cSPatrick McHardy * struct nft_set_estimate - estimation of memory and performance 272c50b960cSPatrick McHardy * characteristics 273c50b960cSPatrick McHardy * 274c50b960cSPatrick McHardy * @size: required memory 27555af753cSPablo Neira Ayuso * @lookup: lookup performance class 2760b5a7874SPablo Neira Ayuso * @space: memory class 277c50b960cSPatrick McHardy */ 278c50b960cSPatrick McHardy struct nft_set_estimate { 279c50b960cSPatrick McHardy unsigned int size; 28055af753cSPablo Neira Ayuso enum nft_set_class lookup; 2810b5a7874SPablo Neira Ayuso enum nft_set_class space; 282c50b960cSPatrick McHardy }; 283c50b960cSPatrick McHardy 284b2832dd6SPatrick McHardy struct nft_set_ext; 28522fe54d5SPatrick McHardy struct nft_expr; 286b2832dd6SPatrick McHardy 287c50b960cSPatrick McHardy /** 28820a69341SPatrick McHardy * struct nft_set_ops - nf_tables set operations 28920a69341SPatrick McHardy * 29020a69341SPatrick McHardy * @lookup: look up an element within the set 29120a69341SPatrick McHardy * @insert: insert new element into set 292cc02e457SPatrick McHardy * @activate: activate new element in the next generation 2938411b644SPablo Neira Ayuso * @deactivate: lookup for element and deactivate it in the next generation 2941ba1c414SPablo Neira Ayuso * @flush: deactivate element in the next generation 29520a69341SPatrick McHardy * @remove: remove element from set 29620a69341SPatrick McHardy * @walk: iterate over all set elemeennts 29720a69341SPatrick McHardy * @privsize: function to return size of set private data 29820a69341SPatrick McHardy * @init: initialize private data of new set instance 29920a69341SPatrick McHardy * @destroy: destroy private data of set instance 30020a69341SPatrick McHardy * @list: nf_tables_set_ops list node 30120a69341SPatrick McHardy * @owner: module reference 302fe2811ebSPatrick McHardy * @elemsize: element private size 30320a69341SPatrick McHardy * @features: features supported by the implementation 30420a69341SPatrick McHardy */ 30520a69341SPatrick McHardy struct nft_set_ops { 30642a55769SPablo Neira Ayuso bool (*lookup)(const struct net *net, 30742a55769SPablo Neira Ayuso const struct nft_set *set, 3088cd8937aSPatrick McHardy const u32 *key, 309b2832dd6SPatrick McHardy const struct nft_set_ext **ext); 31022fe54d5SPatrick McHardy bool (*update)(struct nft_set *set, 3118cd8937aSPatrick McHardy const u32 *key, 31222fe54d5SPatrick McHardy void *(*new)(struct nft_set *, 31322fe54d5SPatrick McHardy const struct nft_expr *, 314a55e22e9SPatrick McHardy struct nft_regs *), 31522fe54d5SPatrick McHardy const struct nft_expr *expr, 316a55e22e9SPatrick McHardy struct nft_regs *regs, 31722fe54d5SPatrick McHardy const struct nft_set_ext **ext); 31822fe54d5SPatrick McHardy 31942a55769SPablo Neira Ayuso int (*insert)(const struct net *net, 32042a55769SPablo Neira Ayuso const struct nft_set *set, 321c016c7e4SPablo Neira Ayuso const struct nft_set_elem *elem, 322c016c7e4SPablo Neira Ayuso struct nft_set_ext **ext); 32342a55769SPablo Neira Ayuso void (*activate)(const struct net *net, 32442a55769SPablo Neira Ayuso const struct nft_set *set, 325cc02e457SPatrick McHardy const struct nft_set_elem *elem); 32642a55769SPablo Neira Ayuso void * (*deactivate)(const struct net *net, 32742a55769SPablo Neira Ayuso const struct nft_set *set, 328cc02e457SPatrick McHardy const struct nft_set_elem *elem); 3291ba1c414SPablo Neira Ayuso bool (*flush)(const struct net *net, 3308411b644SPablo Neira Ayuso const struct nft_set *set, 3318411b644SPablo Neira Ayuso void *priv); 3325cb82a38SPablo Neira Ayuso void (*remove)(const struct net *net, 3335cb82a38SPablo Neira Ayuso const struct nft_set *set, 33420a69341SPatrick McHardy const struct nft_set_elem *elem); 33520a69341SPatrick McHardy void (*walk)(const struct nft_ctx *ctx, 336de70185dSPablo Neira Ayuso struct nft_set *set, 33720a69341SPatrick McHardy struct nft_set_iter *iter); 33820a69341SPatrick McHardy 33920a69341SPatrick McHardy unsigned int (*privsize)(const struct nlattr * const nla[]); 340c50b960cSPatrick McHardy bool (*estimate)(const struct nft_set_desc *desc, 341c50b960cSPatrick McHardy u32 features, 342c50b960cSPatrick McHardy struct nft_set_estimate *est); 34320a69341SPatrick McHardy int (*init)(const struct nft_set *set, 344c50b960cSPatrick McHardy const struct nft_set_desc *desc, 34520a69341SPatrick McHardy const struct nlattr * const nla[]); 34620a69341SPatrick McHardy void (*destroy)(const struct nft_set *set); 34720a69341SPatrick McHardy 34820a69341SPatrick McHardy struct list_head list; 34920a69341SPatrick McHardy struct module *owner; 350fe2811ebSPatrick McHardy unsigned int elemsize; 35120a69341SPatrick McHardy u32 features; 35220a69341SPatrick McHardy }; 35320a69341SPatrick McHardy 3545eccdfaaSJoe Perches int nft_register_set(struct nft_set_ops *ops); 3555eccdfaaSJoe Perches void nft_unregister_set(struct nft_set_ops *ops); 35620a69341SPatrick McHardy 35720a69341SPatrick McHardy /** 35820a69341SPatrick McHardy * struct nft_set - nf_tables set instance 35920a69341SPatrick McHardy * 36020a69341SPatrick McHardy * @list: table set list node 36120a69341SPatrick McHardy * @bindings: list of set bindings 36220a69341SPatrick McHardy * @name: name of the set 36320a69341SPatrick McHardy * @ktype: key type (numeric type defined by userspace, not used in the kernel) 36420a69341SPatrick McHardy * @dtype: data type (verdict or numeric type defined by userspace) 3658aeff920SPablo Neira Ayuso * @objtype: object type (see NFT_OBJECT_* definitions) 366c50b960cSPatrick McHardy * @size: maximum set size 367c50b960cSPatrick McHardy * @nelems: number of elements 3683dd0673aSPatrick McHardy * @ndeact: number of deactivated elements queued for removal 369d3e2a111SAnders K. Pedersen * @timeout: default timeout value in jiffies 370761da293SPatrick McHardy * @gc_int: garbage collection interval in msecs 3719363dc4bSArturo Borrero * @policy: set parameterization (see enum nft_set_policies) 372e6d8ecacSCarlos Falgueras García * @udlen: user data length 373e6d8ecacSCarlos Falgueras García * @udata: user data 37420a69341SPatrick McHardy * @ops: set ops 37520a69341SPatrick McHardy * @flags: set flags 37637a9cc52SPablo Neira Ayuso * @genmask: generation mask 37720a69341SPatrick McHardy * @klen: key length 37820a69341SPatrick McHardy * @dlen: data length 37920a69341SPatrick McHardy * @data: private set data 38020a69341SPatrick McHardy */ 38120a69341SPatrick McHardy struct nft_set { 38220a69341SPatrick McHardy struct list_head list; 38320a69341SPatrick McHardy struct list_head bindings; 384cb39ad8bSPablo Neira Ayuso char name[NFT_SET_MAXNAMELEN]; 38520a69341SPatrick McHardy u32 ktype; 38620a69341SPatrick McHardy u32 dtype; 3878aeff920SPablo Neira Ayuso u32 objtype; 388c50b960cSPatrick McHardy u32 size; 3893dd0673aSPatrick McHardy atomic_t nelems; 3903dd0673aSPatrick McHardy u32 ndeact; 391761da293SPatrick McHardy u64 timeout; 392761da293SPatrick McHardy u32 gc_int; 3939363dc4bSArturo Borrero u16 policy; 394e6d8ecacSCarlos Falgueras García u16 udlen; 395e6d8ecacSCarlos Falgueras García unsigned char *udata; 39620a69341SPatrick McHardy /* runtime data below here */ 39720a69341SPatrick McHardy const struct nft_set_ops *ops ____cacheline_aligned; 39837a9cc52SPablo Neira Ayuso u16 flags:14, 39937a9cc52SPablo Neira Ayuso genmask:2; 40020a69341SPatrick McHardy u8 klen; 40120a69341SPatrick McHardy u8 dlen; 40220a69341SPatrick McHardy unsigned char data[] 40320a69341SPatrick McHardy __attribute__((aligned(__alignof__(u64)))); 40420a69341SPatrick McHardy }; 40520a69341SPatrick McHardy 40620a69341SPatrick McHardy static inline void *nft_set_priv(const struct nft_set *set) 40720a69341SPatrick McHardy { 40820a69341SPatrick McHardy return (void *)set->data; 40920a69341SPatrick McHardy } 41020a69341SPatrick McHardy 4119d098292SPatrick McHardy static inline struct nft_set *nft_set_container_of(const void *priv) 4129d098292SPatrick McHardy { 4139d098292SPatrick McHardy return (void *)priv - offsetof(struct nft_set, data); 4149d098292SPatrick McHardy } 4159d098292SPatrick McHardy 416c7a72e3fSPablo Neira Ayuso struct nft_set *nft_set_lookup(const struct net *net, 417c7a72e3fSPablo Neira Ayuso const struct nft_table *table, 418c7a72e3fSPablo Neira Ayuso const struct nlattr *nla_set_name, 419c7a72e3fSPablo Neira Ayuso const struct nlattr *nla_set_id, 420c7a72e3fSPablo Neira Ayuso u8 genmask); 42120a69341SPatrick McHardy 422761da293SPatrick McHardy static inline unsigned long nft_set_gc_interval(const struct nft_set *set) 423761da293SPatrick McHardy { 424761da293SPatrick McHardy return set->gc_int ? msecs_to_jiffies(set->gc_int) : HZ; 425761da293SPatrick McHardy } 426761da293SPatrick McHardy 42720a69341SPatrick McHardy /** 42820a69341SPatrick McHardy * struct nft_set_binding - nf_tables set binding 42920a69341SPatrick McHardy * 43020a69341SPatrick McHardy * @list: set bindings list node 43120a69341SPatrick McHardy * @chain: chain containing the rule bound to the set 43211113e19SPatrick McHardy * @flags: set action flags 43320a69341SPatrick McHardy * 43420a69341SPatrick McHardy * A set binding contains all information necessary for validation 43520a69341SPatrick McHardy * of new elements added to a bound set. 43620a69341SPatrick McHardy */ 43720a69341SPatrick McHardy struct nft_set_binding { 43820a69341SPatrick McHardy struct list_head list; 43920a69341SPatrick McHardy const struct nft_chain *chain; 44011113e19SPatrick McHardy u32 flags; 44120a69341SPatrick McHardy }; 44220a69341SPatrick McHardy 4435eccdfaaSJoe Perches int nf_tables_bind_set(const struct nft_ctx *ctx, struct nft_set *set, 44420a69341SPatrick McHardy struct nft_set_binding *binding); 4455eccdfaaSJoe Perches void nf_tables_unbind_set(const struct nft_ctx *ctx, struct nft_set *set, 44620a69341SPatrick McHardy struct nft_set_binding *binding); 44720a69341SPatrick McHardy 4483ac4c07aSPatrick McHardy /** 4493ac4c07aSPatrick McHardy * enum nft_set_extensions - set extension type IDs 4503ac4c07aSPatrick McHardy * 4513ac4c07aSPatrick McHardy * @NFT_SET_EXT_KEY: element key 4523ac4c07aSPatrick McHardy * @NFT_SET_EXT_DATA: mapping data 4533ac4c07aSPatrick McHardy * @NFT_SET_EXT_FLAGS: element flags 454c3e1b005SPatrick McHardy * @NFT_SET_EXT_TIMEOUT: element timeout 455c3e1b005SPatrick McHardy * @NFT_SET_EXT_EXPIRATION: element expiration time 45668e942e8SPatrick McHardy * @NFT_SET_EXT_USERDATA: user data associated with the element 457f25ad2e9SPatrick McHardy * @NFT_SET_EXT_EXPR: expression assiociated with the element 4588aeff920SPablo Neira Ayuso * @NFT_SET_EXT_OBJREF: stateful object reference associated with element 4593ac4c07aSPatrick McHardy * @NFT_SET_EXT_NUM: number of extension types 4603ac4c07aSPatrick McHardy */ 4613ac4c07aSPatrick McHardy enum nft_set_extensions { 4623ac4c07aSPatrick McHardy NFT_SET_EXT_KEY, 4633ac4c07aSPatrick McHardy NFT_SET_EXT_DATA, 4643ac4c07aSPatrick McHardy NFT_SET_EXT_FLAGS, 465c3e1b005SPatrick McHardy NFT_SET_EXT_TIMEOUT, 466c3e1b005SPatrick McHardy NFT_SET_EXT_EXPIRATION, 46768e942e8SPatrick McHardy NFT_SET_EXT_USERDATA, 468f25ad2e9SPatrick McHardy NFT_SET_EXT_EXPR, 4698aeff920SPablo Neira Ayuso NFT_SET_EXT_OBJREF, 4703ac4c07aSPatrick McHardy NFT_SET_EXT_NUM 4713ac4c07aSPatrick McHardy }; 4723ac4c07aSPatrick McHardy 4733ac4c07aSPatrick McHardy /** 4743ac4c07aSPatrick McHardy * struct nft_set_ext_type - set extension type 4753ac4c07aSPatrick McHardy * 4763ac4c07aSPatrick McHardy * @len: fixed part length of the extension 4773ac4c07aSPatrick McHardy * @align: alignment requirements of the extension 4783ac4c07aSPatrick McHardy */ 4793ac4c07aSPatrick McHardy struct nft_set_ext_type { 4803ac4c07aSPatrick McHardy u8 len; 4813ac4c07aSPatrick McHardy u8 align; 4823ac4c07aSPatrick McHardy }; 4833ac4c07aSPatrick McHardy 4843ac4c07aSPatrick McHardy extern const struct nft_set_ext_type nft_set_ext_types[]; 4853ac4c07aSPatrick McHardy 4863ac4c07aSPatrick McHardy /** 4873ac4c07aSPatrick McHardy * struct nft_set_ext_tmpl - set extension template 4883ac4c07aSPatrick McHardy * 4893ac4c07aSPatrick McHardy * @len: length of extension area 4903ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 4913ac4c07aSPatrick McHardy */ 4923ac4c07aSPatrick McHardy struct nft_set_ext_tmpl { 4933ac4c07aSPatrick McHardy u16 len; 4943ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 4953ac4c07aSPatrick McHardy }; 4963ac4c07aSPatrick McHardy 4973ac4c07aSPatrick McHardy /** 4983ac4c07aSPatrick McHardy * struct nft_set_ext - set extensions 4993ac4c07aSPatrick McHardy * 500cc02e457SPatrick McHardy * @genmask: generation mask 5013ac4c07aSPatrick McHardy * @offset: offsets of individual extension types 5023ac4c07aSPatrick McHardy * @data: beginning of extension data 5033ac4c07aSPatrick McHardy */ 5043ac4c07aSPatrick McHardy struct nft_set_ext { 505cc02e457SPatrick McHardy u8 genmask; 5063ac4c07aSPatrick McHardy u8 offset[NFT_SET_EXT_NUM]; 5073ac4c07aSPatrick McHardy char data[0]; 5083ac4c07aSPatrick McHardy }; 5093ac4c07aSPatrick McHardy 5103ac4c07aSPatrick McHardy static inline void nft_set_ext_prepare(struct nft_set_ext_tmpl *tmpl) 5113ac4c07aSPatrick McHardy { 5123ac4c07aSPatrick McHardy memset(tmpl, 0, sizeof(*tmpl)); 5133ac4c07aSPatrick McHardy tmpl->len = sizeof(struct nft_set_ext); 5143ac4c07aSPatrick McHardy } 5153ac4c07aSPatrick McHardy 5163ac4c07aSPatrick McHardy static inline void nft_set_ext_add_length(struct nft_set_ext_tmpl *tmpl, u8 id, 5173ac4c07aSPatrick McHardy unsigned int len) 5183ac4c07aSPatrick McHardy { 5193ac4c07aSPatrick McHardy tmpl->len = ALIGN(tmpl->len, nft_set_ext_types[id].align); 5203ac4c07aSPatrick McHardy BUG_ON(tmpl->len > U8_MAX); 5213ac4c07aSPatrick McHardy tmpl->offset[id] = tmpl->len; 5223ac4c07aSPatrick McHardy tmpl->len += nft_set_ext_types[id].len + len; 5233ac4c07aSPatrick McHardy } 5243ac4c07aSPatrick McHardy 5253ac4c07aSPatrick McHardy static inline void nft_set_ext_add(struct nft_set_ext_tmpl *tmpl, u8 id) 5263ac4c07aSPatrick McHardy { 5273ac4c07aSPatrick McHardy nft_set_ext_add_length(tmpl, id, 0); 5283ac4c07aSPatrick McHardy } 5293ac4c07aSPatrick McHardy 5303ac4c07aSPatrick McHardy static inline void nft_set_ext_init(struct nft_set_ext *ext, 5313ac4c07aSPatrick McHardy const struct nft_set_ext_tmpl *tmpl) 5323ac4c07aSPatrick McHardy { 5333ac4c07aSPatrick McHardy memcpy(ext->offset, tmpl->offset, sizeof(ext->offset)); 5343ac4c07aSPatrick McHardy } 5353ac4c07aSPatrick McHardy 5363ac4c07aSPatrick McHardy static inline bool __nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 5373ac4c07aSPatrick McHardy { 5383ac4c07aSPatrick McHardy return !!ext->offset[id]; 5393ac4c07aSPatrick McHardy } 5403ac4c07aSPatrick McHardy 5413ac4c07aSPatrick McHardy static inline bool nft_set_ext_exists(const struct nft_set_ext *ext, u8 id) 5423ac4c07aSPatrick McHardy { 5433ac4c07aSPatrick McHardy return ext && __nft_set_ext_exists(ext, id); 5443ac4c07aSPatrick McHardy } 5453ac4c07aSPatrick McHardy 5463ac4c07aSPatrick McHardy static inline void *nft_set_ext(const struct nft_set_ext *ext, u8 id) 5473ac4c07aSPatrick McHardy { 5483ac4c07aSPatrick McHardy return (void *)ext + ext->offset[id]; 5493ac4c07aSPatrick McHardy } 5503ac4c07aSPatrick McHardy 5513ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_key(const struct nft_set_ext *ext) 5523ac4c07aSPatrick McHardy { 5533ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_KEY); 5543ac4c07aSPatrick McHardy } 5553ac4c07aSPatrick McHardy 5563ac4c07aSPatrick McHardy static inline struct nft_data *nft_set_ext_data(const struct nft_set_ext *ext) 5573ac4c07aSPatrick McHardy { 5583ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_DATA); 5593ac4c07aSPatrick McHardy } 5603ac4c07aSPatrick McHardy 5613ac4c07aSPatrick McHardy static inline u8 *nft_set_ext_flags(const struct nft_set_ext *ext) 5623ac4c07aSPatrick McHardy { 5633ac4c07aSPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_FLAGS); 5643ac4c07aSPatrick McHardy } 565ef1f7df9SPatrick McHardy 566c3e1b005SPatrick McHardy static inline u64 *nft_set_ext_timeout(const struct nft_set_ext *ext) 567c3e1b005SPatrick McHardy { 568c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_TIMEOUT); 569c3e1b005SPatrick McHardy } 570c3e1b005SPatrick McHardy 571c3e1b005SPatrick McHardy static inline unsigned long *nft_set_ext_expiration(const struct nft_set_ext *ext) 572c3e1b005SPatrick McHardy { 573c3e1b005SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_EXPIRATION); 574c3e1b005SPatrick McHardy } 575c3e1b005SPatrick McHardy 57668e942e8SPatrick McHardy static inline struct nft_userdata *nft_set_ext_userdata(const struct nft_set_ext *ext) 57768e942e8SPatrick McHardy { 57868e942e8SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_USERDATA); 57968e942e8SPatrick McHardy } 58068e942e8SPatrick McHardy 581f25ad2e9SPatrick McHardy static inline struct nft_expr *nft_set_ext_expr(const struct nft_set_ext *ext) 582f25ad2e9SPatrick McHardy { 583f25ad2e9SPatrick McHardy return nft_set_ext(ext, NFT_SET_EXT_EXPR); 584f25ad2e9SPatrick McHardy } 585f25ad2e9SPatrick McHardy 586c3e1b005SPatrick McHardy static inline bool nft_set_elem_expired(const struct nft_set_ext *ext) 587c3e1b005SPatrick McHardy { 588c3e1b005SPatrick McHardy return nft_set_ext_exists(ext, NFT_SET_EXT_EXPIRATION) && 589c3e1b005SPatrick McHardy time_is_before_eq_jiffies(*nft_set_ext_expiration(ext)); 590c3e1b005SPatrick McHardy } 591c3e1b005SPatrick McHardy 592fe2811ebSPatrick McHardy static inline struct nft_set_ext *nft_set_elem_ext(const struct nft_set *set, 593fe2811ebSPatrick McHardy void *elem) 594fe2811ebSPatrick McHardy { 595fe2811ebSPatrick McHardy return elem + set->ops->elemsize; 596fe2811ebSPatrick McHardy } 597fe2811ebSPatrick McHardy 5988aeff920SPablo Neira Ayuso static inline struct nft_object **nft_set_ext_obj(const struct nft_set_ext *ext) 5998aeff920SPablo Neira Ayuso { 6008aeff920SPablo Neira Ayuso return nft_set_ext(ext, NFT_SET_EXT_OBJREF); 6018aeff920SPablo Neira Ayuso } 6028aeff920SPablo Neira Ayuso 60322fe54d5SPatrick McHardy void *nft_set_elem_init(const struct nft_set *set, 60422fe54d5SPatrick McHardy const struct nft_set_ext_tmpl *tmpl, 60549499c3eSPatrick McHardy const u32 *key, const u32 *data, 60622fe54d5SPatrick McHardy u64 timeout, gfp_t gfp); 60761f9e292SLiping Zhang void nft_set_elem_destroy(const struct nft_set *set, void *elem, 60861f9e292SLiping Zhang bool destroy_expr); 60961edafbbSPatrick McHardy 61020a69341SPatrick McHardy /** 611cfed7e1bSPatrick McHardy * struct nft_set_gc_batch_head - nf_tables set garbage collection batch 612cfed7e1bSPatrick McHardy * 613cfed7e1bSPatrick McHardy * @rcu: rcu head 614cfed7e1bSPatrick McHardy * @set: set the elements belong to 615cfed7e1bSPatrick McHardy * @cnt: count of elements 616cfed7e1bSPatrick McHardy */ 617cfed7e1bSPatrick McHardy struct nft_set_gc_batch_head { 618cfed7e1bSPatrick McHardy struct rcu_head rcu; 619cfed7e1bSPatrick McHardy const struct nft_set *set; 620cfed7e1bSPatrick McHardy unsigned int cnt; 621cfed7e1bSPatrick McHardy }; 622cfed7e1bSPatrick McHardy 623cfed7e1bSPatrick McHardy #define NFT_SET_GC_BATCH_SIZE ((PAGE_SIZE - \ 624cfed7e1bSPatrick McHardy sizeof(struct nft_set_gc_batch_head)) / \ 625cfed7e1bSPatrick McHardy sizeof(void *)) 626cfed7e1bSPatrick McHardy 627cfed7e1bSPatrick McHardy /** 628cfed7e1bSPatrick McHardy * struct nft_set_gc_batch - nf_tables set garbage collection batch 629cfed7e1bSPatrick McHardy * 630cfed7e1bSPatrick McHardy * @head: GC batch head 631cfed7e1bSPatrick McHardy * @elems: garbage collection elements 632cfed7e1bSPatrick McHardy */ 633cfed7e1bSPatrick McHardy struct nft_set_gc_batch { 634cfed7e1bSPatrick McHardy struct nft_set_gc_batch_head head; 635cfed7e1bSPatrick McHardy void *elems[NFT_SET_GC_BATCH_SIZE]; 636cfed7e1bSPatrick McHardy }; 637cfed7e1bSPatrick McHardy 638cfed7e1bSPatrick McHardy struct nft_set_gc_batch *nft_set_gc_batch_alloc(const struct nft_set *set, 639cfed7e1bSPatrick McHardy gfp_t gfp); 640cfed7e1bSPatrick McHardy void nft_set_gc_batch_release(struct rcu_head *rcu); 641cfed7e1bSPatrick McHardy 642cfed7e1bSPatrick McHardy static inline void nft_set_gc_batch_complete(struct nft_set_gc_batch *gcb) 643cfed7e1bSPatrick McHardy { 644cfed7e1bSPatrick McHardy if (gcb != NULL) 645cfed7e1bSPatrick McHardy call_rcu(&gcb->head.rcu, nft_set_gc_batch_release); 646cfed7e1bSPatrick McHardy } 647cfed7e1bSPatrick McHardy 648cfed7e1bSPatrick McHardy static inline struct nft_set_gc_batch * 649cfed7e1bSPatrick McHardy nft_set_gc_batch_check(const struct nft_set *set, struct nft_set_gc_batch *gcb, 650cfed7e1bSPatrick McHardy gfp_t gfp) 651cfed7e1bSPatrick McHardy { 652cfed7e1bSPatrick McHardy if (gcb != NULL) { 653cfed7e1bSPatrick McHardy if (gcb->head.cnt + 1 < ARRAY_SIZE(gcb->elems)) 654cfed7e1bSPatrick McHardy return gcb; 655cfed7e1bSPatrick McHardy nft_set_gc_batch_complete(gcb); 656cfed7e1bSPatrick McHardy } 657cfed7e1bSPatrick McHardy return nft_set_gc_batch_alloc(set, gfp); 658cfed7e1bSPatrick McHardy } 659cfed7e1bSPatrick McHardy 660cfed7e1bSPatrick McHardy static inline void nft_set_gc_batch_add(struct nft_set_gc_batch *gcb, 661cfed7e1bSPatrick McHardy void *elem) 662cfed7e1bSPatrick McHardy { 663cfed7e1bSPatrick McHardy gcb->elems[gcb->head.cnt++] = elem; 664cfed7e1bSPatrick McHardy } 665cfed7e1bSPatrick McHardy 666cfed7e1bSPatrick McHardy /** 667ef1f7df9SPatrick McHardy * struct nft_expr_type - nf_tables expression type 66896518518SPatrick McHardy * 669ef1f7df9SPatrick McHardy * @select_ops: function to select nft_expr_ops 670ef1f7df9SPatrick McHardy * @ops: default ops, used when no select_ops functions is present 67196518518SPatrick McHardy * @list: used internally 67296518518SPatrick McHardy * @name: Identifier 67396518518SPatrick McHardy * @owner: module reference 67496518518SPatrick McHardy * @policy: netlink attribute policy 67596518518SPatrick McHardy * @maxattr: highest netlink attribute number 67664d46806SPatrick McHardy * @family: address family for AF-specific types 677151d799aSPatrick McHardy * @flags: expression type flags 678ef1f7df9SPatrick McHardy */ 679ef1f7df9SPatrick McHardy struct nft_expr_type { 6800ca743a5SPablo Neira Ayuso const struct nft_expr_ops *(*select_ops)(const struct nft_ctx *, 6810ca743a5SPablo Neira Ayuso const struct nlattr * const tb[]); 682ef1f7df9SPatrick McHardy const struct nft_expr_ops *ops; 683ef1f7df9SPatrick McHardy struct list_head list; 684ef1f7df9SPatrick McHardy const char *name; 685ef1f7df9SPatrick McHardy struct module *owner; 686ef1f7df9SPatrick McHardy const struct nla_policy *policy; 687ef1f7df9SPatrick McHardy unsigned int maxattr; 68864d46806SPatrick McHardy u8 family; 689151d799aSPatrick McHardy u8 flags; 690ef1f7df9SPatrick McHardy }; 691ef1f7df9SPatrick McHardy 692151d799aSPatrick McHardy #define NFT_EXPR_STATEFUL 0x1 693151d799aSPatrick McHardy 694ef1f7df9SPatrick McHardy /** 695ef1f7df9SPatrick McHardy * struct nft_expr_ops - nf_tables expression operations 696ef1f7df9SPatrick McHardy * 697ef1f7df9SPatrick McHardy * @eval: Expression evaluation function 69896518518SPatrick McHardy * @size: full expression size, including private data size 699ef1f7df9SPatrick McHardy * @init: initialization function 700ef1f7df9SPatrick McHardy * @destroy: destruction function 701ef1f7df9SPatrick McHardy * @dump: function to dump parameters 702ef1f7df9SPatrick McHardy * @type: expression type 7030ca743a5SPablo Neira Ayuso * @validate: validate expression, called during loop detection 7040ca743a5SPablo Neira Ayuso * @data: extra data to attach to this expression operation 70596518518SPatrick McHardy */ 70696518518SPatrick McHardy struct nft_expr; 70796518518SPatrick McHardy struct nft_expr_ops { 70896518518SPatrick McHardy void (*eval)(const struct nft_expr *expr, 709a55e22e9SPatrick McHardy struct nft_regs *regs, 71096518518SPatrick McHardy const struct nft_pktinfo *pkt); 711086f3321SPablo Neira Ayuso int (*clone)(struct nft_expr *dst, 712086f3321SPablo Neira Ayuso const struct nft_expr *src); 713ef1f7df9SPatrick McHardy unsigned int size; 714ef1f7df9SPatrick McHardy 71596518518SPatrick McHardy int (*init)(const struct nft_ctx *ctx, 71696518518SPatrick McHardy const struct nft_expr *expr, 71796518518SPatrick McHardy const struct nlattr * const tb[]); 71862472bceSPatrick McHardy void (*destroy)(const struct nft_ctx *ctx, 71962472bceSPatrick McHardy const struct nft_expr *expr); 72096518518SPatrick McHardy int (*dump)(struct sk_buff *skb, 72196518518SPatrick McHardy const struct nft_expr *expr); 7220ca743a5SPablo Neira Ayuso int (*validate)(const struct nft_ctx *ctx, 7230ca743a5SPablo Neira Ayuso const struct nft_expr *expr, 7240ca743a5SPablo Neira Ayuso const struct nft_data **data); 725ef1f7df9SPatrick McHardy const struct nft_expr_type *type; 7260ca743a5SPablo Neira Ayuso void *data; 72796518518SPatrick McHardy }; 72896518518SPatrick McHardy 729ef1f7df9SPatrick McHardy #define NFT_EXPR_MAXATTR 16 73096518518SPatrick McHardy #define NFT_EXPR_SIZE(size) (sizeof(struct nft_expr) + \ 73196518518SPatrick McHardy ALIGN(size, __alignof__(struct nft_expr))) 73296518518SPatrick McHardy 73396518518SPatrick McHardy /** 73496518518SPatrick McHardy * struct nft_expr - nf_tables expression 73596518518SPatrick McHardy * 73696518518SPatrick McHardy * @ops: expression ops 73796518518SPatrick McHardy * @data: expression private data 73896518518SPatrick McHardy */ 73996518518SPatrick McHardy struct nft_expr { 74096518518SPatrick McHardy const struct nft_expr_ops *ops; 74196518518SPatrick McHardy unsigned char data[]; 74296518518SPatrick McHardy }; 74396518518SPatrick McHardy 74496518518SPatrick McHardy static inline void *nft_expr_priv(const struct nft_expr *expr) 74596518518SPatrick McHardy { 74696518518SPatrick McHardy return (void *)expr->data; 74796518518SPatrick McHardy } 74896518518SPatrick McHardy 7490b2d8a7bSPatrick McHardy struct nft_expr *nft_expr_init(const struct nft_ctx *ctx, 7500b2d8a7bSPatrick McHardy const struct nlattr *nla); 7510b2d8a7bSPatrick McHardy void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr); 7520b2d8a7bSPatrick McHardy int nft_expr_dump(struct sk_buff *skb, unsigned int attr, 7530b2d8a7bSPatrick McHardy const struct nft_expr *expr); 7540b2d8a7bSPatrick McHardy 755086f3321SPablo Neira Ayuso static inline int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src) 7560b2d8a7bSPatrick McHardy { 757086f3321SPablo Neira Ayuso int err; 758086f3321SPablo Neira Ayuso 759086f3321SPablo Neira Ayuso if (src->ops->clone) { 760086f3321SPablo Neira Ayuso dst->ops = src->ops; 761086f3321SPablo Neira Ayuso err = src->ops->clone(dst, src); 762086f3321SPablo Neira Ayuso if (err < 0) 763086f3321SPablo Neira Ayuso return err; 764086f3321SPablo Neira Ayuso } else { 7650b2d8a7bSPatrick McHardy memcpy(dst, src, src->ops->size); 7660b2d8a7bSPatrick McHardy } 76761f9e292SLiping Zhang 76861f9e292SLiping Zhang __module_get(src->ops->type->owner); 769086f3321SPablo Neira Ayuso return 0; 770086f3321SPablo Neira Ayuso } 7710b2d8a7bSPatrick McHardy 77296518518SPatrick McHardy /** 77396518518SPatrick McHardy * struct nft_rule - nf_tables rule 77496518518SPatrick McHardy * 77596518518SPatrick McHardy * @list: used internally 77696518518SPatrick McHardy * @handle: rule handle 7770628b123SPablo Neira Ayuso * @genmask: generation mask 77896518518SPatrick McHardy * @dlen: length of expression data 77986f1ec32SPatrick McHardy * @udata: user data is appended to the rule 78096518518SPatrick McHardy * @data: expression data 78196518518SPatrick McHardy */ 78296518518SPatrick McHardy struct nft_rule { 78396518518SPatrick McHardy struct list_head list; 7840768b3b3SPablo Neira Ayuso u64 handle:42, 7850628b123SPablo Neira Ayuso genmask:2, 7860768b3b3SPablo Neira Ayuso dlen:12, 78786f1ec32SPatrick McHardy udata:1; 78896518518SPatrick McHardy unsigned char data[] 78996518518SPatrick McHardy __attribute__((aligned(__alignof__(struct nft_expr)))); 79096518518SPatrick McHardy }; 79196518518SPatrick McHardy 79296518518SPatrick McHardy static inline struct nft_expr *nft_expr_first(const struct nft_rule *rule) 79396518518SPatrick McHardy { 79496518518SPatrick McHardy return (struct nft_expr *)&rule->data[0]; 79596518518SPatrick McHardy } 79696518518SPatrick McHardy 79796518518SPatrick McHardy static inline struct nft_expr *nft_expr_next(const struct nft_expr *expr) 79896518518SPatrick McHardy { 79996518518SPatrick McHardy return ((void *)expr) + expr->ops->size; 80096518518SPatrick McHardy } 80196518518SPatrick McHardy 80296518518SPatrick McHardy static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule) 80396518518SPatrick McHardy { 80496518518SPatrick McHardy return (struct nft_expr *)&rule->data[rule->dlen]; 80596518518SPatrick McHardy } 80696518518SPatrick McHardy 80786f1ec32SPatrick McHardy static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule) 8080768b3b3SPablo Neira Ayuso { 8090768b3b3SPablo Neira Ayuso return (void *)&rule->data[rule->dlen]; 8100768b3b3SPablo Neira Ayuso } 8110768b3b3SPablo Neira Ayuso 81296518518SPatrick McHardy /* 81396518518SPatrick McHardy * The last pointer isn't really necessary, but the compiler isn't able to 81496518518SPatrick McHardy * determine that the result of nft_expr_last() is always the same since it 81596518518SPatrick McHardy * can't assume that the dlen value wasn't changed within calls in the loop. 81696518518SPatrick McHardy */ 81796518518SPatrick McHardy #define nft_rule_for_each_expr(expr, last, rule) \ 81896518518SPatrick McHardy for ((expr) = nft_expr_first(rule), (last) = nft_expr_last(rule); \ 81996518518SPatrick McHardy (expr) != (last); \ 82096518518SPatrick McHardy (expr) = nft_expr_next(expr)) 82196518518SPatrick McHardy 82296518518SPatrick McHardy enum nft_chain_flags { 82396518518SPatrick McHardy NFT_BASE_CHAIN = 0x1, 82496518518SPatrick McHardy }; 82596518518SPatrick McHardy 82696518518SPatrick McHardy /** 82796518518SPatrick McHardy * struct nft_chain - nf_tables chain 82896518518SPatrick McHardy * 82996518518SPatrick McHardy * @rules: list of rules in the chain 83096518518SPatrick McHardy * @list: used internally 831b5bc89bfSPablo Neira Ayuso * @table: table that this chain belongs to 83296518518SPatrick McHardy * @handle: chain handle 83396518518SPatrick McHardy * @use: number of jump references to this chain 83496518518SPatrick McHardy * @level: length of longest path to this chain 835a0a7379eSPablo Neira Ayuso * @flags: bitmask of enum nft_chain_flags 83696518518SPatrick McHardy * @name: name of the chain 83796518518SPatrick McHardy */ 83896518518SPatrick McHardy struct nft_chain { 83996518518SPatrick McHardy struct list_head rules; 84096518518SPatrick McHardy struct list_head list; 841b5bc89bfSPablo Neira Ayuso struct nft_table *table; 84296518518SPatrick McHardy u64 handle; 843a0a7379eSPablo Neira Ayuso u32 use; 84496518518SPatrick McHardy u16 level; 845664b0f8cSPablo Neira Ayuso u8 flags:6, 846664b0f8cSPablo Neira Ayuso genmask:2; 84796518518SPatrick McHardy char name[NFT_CHAIN_MAXNAMELEN]; 84896518518SPatrick McHardy }; 84996518518SPatrick McHardy 8509370761cSPablo Neira Ayuso enum nft_chain_type { 8519370761cSPablo Neira Ayuso NFT_CHAIN_T_DEFAULT = 0, 8529370761cSPablo Neira Ayuso NFT_CHAIN_T_ROUTE, 8539370761cSPablo Neira Ayuso NFT_CHAIN_T_NAT, 8549370761cSPablo Neira Ayuso NFT_CHAIN_T_MAX 8559370761cSPablo Neira Ayuso }; 8569370761cSPablo Neira Ayuso 8571a1e1a12SPatrick McHardy /** 8581a1e1a12SPatrick McHardy * struct nf_chain_type - nf_tables chain type info 8591a1e1a12SPatrick McHardy * 8601a1e1a12SPatrick McHardy * @name: name of the type 8611a1e1a12SPatrick McHardy * @type: numeric identifier 8621a1e1a12SPatrick McHardy * @family: address family 8631a1e1a12SPatrick McHardy * @owner: module owner 8641a1e1a12SPatrick McHardy * @hook_mask: mask of valid hooks 8651a1e1a12SPatrick McHardy * @hooks: hookfn overrides 8661a1e1a12SPatrick McHardy */ 8671a1e1a12SPatrick McHardy struct nf_chain_type { 8681a1e1a12SPatrick McHardy const char *name; 8691a1e1a12SPatrick McHardy enum nft_chain_type type; 8701a1e1a12SPatrick McHardy int family; 8711a1e1a12SPatrick McHardy struct module *owner; 8721a1e1a12SPatrick McHardy unsigned int hook_mask; 8731a1e1a12SPatrick McHardy nf_hookfn *hooks[NF_MAX_HOOKS]; 8741a1e1a12SPatrick McHardy }; 8751a1e1a12SPatrick McHardy 8767210e4e3SPablo Neira Ayuso int nft_chain_validate_dependency(const struct nft_chain *chain, 8777210e4e3SPablo Neira Ayuso enum nft_chain_type type); 87875e8d06dSPablo Neira Ayuso int nft_chain_validate_hooks(const struct nft_chain *chain, 87975e8d06dSPablo Neira Ayuso unsigned int hook_flags); 8807210e4e3SPablo Neira Ayuso 8810ca743a5SPablo Neira Ayuso struct nft_stats { 8820ca743a5SPablo Neira Ayuso u64 bytes; 8830ca743a5SPablo Neira Ayuso u64 pkts; 884ce355e20SEric Dumazet struct u64_stats_sync syncp; 8850ca743a5SPablo Neira Ayuso }; 8860ca743a5SPablo Neira Ayuso 887115a60b1SPatrick McHardy #define NFT_HOOK_OPS_MAX 2 888115a60b1SPatrick McHardy 88996518518SPatrick McHardy /** 89096518518SPatrick McHardy * struct nft_base_chain - nf_tables base chain 89196518518SPatrick McHardy * 89296518518SPatrick McHardy * @ops: netfilter hook ops 8939370761cSPablo Neira Ayuso * @type: chain type 8940ca743a5SPablo Neira Ayuso * @policy: default policy 8950ca743a5SPablo Neira Ayuso * @stats: per-cpu chain stats 89696518518SPatrick McHardy * @chain: the chain 8972cbce139SPablo Neira Ayuso * @dev_name: device name that this base chain is attached to (if any) 89896518518SPatrick McHardy */ 89996518518SPatrick McHardy struct nft_base_chain { 900115a60b1SPatrick McHardy struct nf_hook_ops ops[NFT_HOOK_OPS_MAX]; 9012a37d755SPatrick McHardy const struct nf_chain_type *type; 9020ca743a5SPablo Neira Ayuso u8 policy; 903835b8033SPablo Neira Ayuso u8 flags; 9040ca743a5SPablo Neira Ayuso struct nft_stats __percpu *stats; 90596518518SPatrick McHardy struct nft_chain chain; 9062cbce139SPablo Neira Ayuso char dev_name[IFNAMSIZ]; 90796518518SPatrick McHardy }; 90896518518SPatrick McHardy 90996518518SPatrick McHardy static inline struct nft_base_chain *nft_base_chain(const struct nft_chain *chain) 91096518518SPatrick McHardy { 91196518518SPatrick McHardy return container_of(chain, struct nft_base_chain, chain); 91296518518SPatrick McHardy } 91396518518SPatrick McHardy 914f323d954SPablo Neira Ayuso static inline bool nft_is_base_chain(const struct nft_chain *chain) 915f323d954SPablo Neira Ayuso { 916f323d954SPablo Neira Ayuso return chain->flags & NFT_BASE_CHAIN; 917f323d954SPablo Neira Ayuso } 918f323d954SPablo Neira Ayuso 9195ebe0b0eSPablo Neira Ayuso int __nft_release_basechain(struct nft_ctx *ctx); 920835b8033SPablo Neira Ayuso 92106198b34SEric W. Biederman unsigned int nft_do_chain(struct nft_pktinfo *pkt, void *priv); 92296518518SPatrick McHardy 92396518518SPatrick McHardy /** 92496518518SPatrick McHardy * struct nft_table - nf_tables table 92596518518SPatrick McHardy * 92696518518SPatrick McHardy * @list: used internally 92796518518SPatrick McHardy * @chains: chains in the table 92896518518SPatrick McHardy * @sets: sets in the table 929e5009240SPablo Neira Ayuso * @objects: stateful objects in the table 93096518518SPatrick McHardy * @hgenerator: handle generator state 93196518518SPatrick McHardy * @use: number of chain references to this table 93296518518SPatrick McHardy * @flags: table flag (see enum nft_table_flags) 933f2a6d766SPablo Neira Ayuso * @genmask: generation mask 93496518518SPatrick McHardy * @name: name of the table 93596518518SPatrick McHardy */ 93696518518SPatrick McHardy struct nft_table { 93796518518SPatrick McHardy struct list_head list; 93896518518SPatrick McHardy struct list_head chains; 93996518518SPatrick McHardy struct list_head sets; 940e5009240SPablo Neira Ayuso struct list_head objects; 94196518518SPatrick McHardy u64 hgenerator; 94296518518SPatrick McHardy u32 use; 943f2a6d766SPablo Neira Ayuso u16 flags:14, 944f2a6d766SPablo Neira Ayuso genmask:2; 9451cae565eSPablo Neira Ayuso char name[NFT_TABLE_MAXNAMELEN]; 946ebddf1a8SPablo Neira Ayuso }; 947ebddf1a8SPablo Neira Ayuso 948ebddf1a8SPablo Neira Ayuso enum nft_af_flags { 949ebddf1a8SPablo Neira Ayuso NFT_AF_NEEDS_DEV = (1 << 0), 95096518518SPatrick McHardy }; 95196518518SPatrick McHardy 95296518518SPatrick McHardy /** 95396518518SPatrick McHardy * struct nft_af_info - nf_tables address family info 95496518518SPatrick McHardy * 95596518518SPatrick McHardy * @list: used internally 95696518518SPatrick McHardy * @family: address family 95796518518SPatrick McHardy * @nhooks: number of hooks in this family 95896518518SPatrick McHardy * @owner: module owner 95996518518SPatrick McHardy * @tables: used internally 960ebddf1a8SPablo Neira Ayuso * @flags: family flags 961115a60b1SPatrick McHardy * @nops: number of hook ops in this family 962115a60b1SPatrick McHardy * @hook_ops_init: initialization function for chain hook ops 96396518518SPatrick McHardy * @hooks: hookfn overrides for packet validation 96496518518SPatrick McHardy */ 96596518518SPatrick McHardy struct nft_af_info { 96696518518SPatrick McHardy struct list_head list; 96796518518SPatrick McHardy int family; 96896518518SPatrick McHardy unsigned int nhooks; 96996518518SPatrick McHardy struct module *owner; 97096518518SPatrick McHardy struct list_head tables; 971ebddf1a8SPablo Neira Ayuso u32 flags; 972115a60b1SPatrick McHardy unsigned int nops; 973115a60b1SPatrick McHardy void (*hook_ops_init)(struct nf_hook_ops *, 974115a60b1SPatrick McHardy unsigned int); 97596518518SPatrick McHardy nf_hookfn *hooks[NF_MAX_HOOKS]; 97696518518SPatrick McHardy }; 97796518518SPatrick McHardy 9785eccdfaaSJoe Perches int nft_register_afinfo(struct net *, struct nft_af_info *); 979df05ef87SPablo Neira Ayuso void nft_unregister_afinfo(struct net *, struct nft_af_info *); 98096518518SPatrick McHardy 9812a37d755SPatrick McHardy int nft_register_chain_type(const struct nf_chain_type *); 9822a37d755SPatrick McHardy void nft_unregister_chain_type(const struct nf_chain_type *); 98396518518SPatrick McHardy 9845eccdfaaSJoe Perches int nft_register_expr(struct nft_expr_type *); 9855eccdfaaSJoe Perches void nft_unregister_expr(struct nft_expr_type *); 98696518518SPatrick McHardy 98733d5a7b1SFlorian Westphal int nft_verdict_dump(struct sk_buff *skb, int type, 98833d5a7b1SFlorian Westphal const struct nft_verdict *v); 98933d5a7b1SFlorian Westphal 99033d5a7b1SFlorian Westphal /** 991e5009240SPablo Neira Ayuso * struct nft_object - nf_tables stateful object 992e5009240SPablo Neira Ayuso * 993e5009240SPablo Neira Ayuso * @list: table stateful object list node 99418965317SPablo Neira Ayuso * @table: table this object belongs to 995e5009240SPablo Neira Ayuso * @type: pointer to object type 996e5009240SPablo Neira Ayuso * @data: pointer to object data 997e5009240SPablo Neira Ayuso * @name: name of this stateful object 998e5009240SPablo Neira Ayuso * @genmask: generation mask 999e5009240SPablo Neira Ayuso * @use: number of references to this stateful object 1000e5009240SPablo Neira Ayuso * @data: object data, layout depends on type 1001e5009240SPablo Neira Ayuso */ 1002e5009240SPablo Neira Ayuso struct nft_object { 1003e5009240SPablo Neira Ayuso struct list_head list; 1004e5009240SPablo Neira Ayuso char name[NFT_OBJ_MAXNAMELEN]; 100518965317SPablo Neira Ayuso struct nft_table *table; 1006e5009240SPablo Neira Ayuso u32 genmask:2, 1007e5009240SPablo Neira Ayuso use:30; 1008e5009240SPablo Neira Ayuso /* runtime data below here */ 1009e5009240SPablo Neira Ayuso const struct nft_object_type *type ____cacheline_aligned; 1010e5009240SPablo Neira Ayuso unsigned char data[] 1011e5009240SPablo Neira Ayuso __attribute__((aligned(__alignof__(u64)))); 1012e5009240SPablo Neira Ayuso }; 1013e5009240SPablo Neira Ayuso 1014e5009240SPablo Neira Ayuso static inline void *nft_obj_data(const struct nft_object *obj) 1015e5009240SPablo Neira Ayuso { 1016e5009240SPablo Neira Ayuso return (void *)obj->data; 1017e5009240SPablo Neira Ayuso } 1018e5009240SPablo Neira Ayuso 1019e5009240SPablo Neira Ayuso #define nft_expr_obj(expr) *((struct nft_object **)nft_expr_priv(expr)) 1020e5009240SPablo Neira Ayuso 1021e5009240SPablo Neira Ayuso struct nft_object *nf_tables_obj_lookup(const struct nft_table *table, 1022e5009240SPablo Neira Ayuso const struct nlattr *nla, u32 objtype, 1023e5009240SPablo Neira Ayuso u8 genmask); 1024e5009240SPablo Neira Ayuso 102525e94a99SPablo Neira Ayuso void nft_obj_notify(struct net *net, struct nft_table *table, 10262599e989SPablo Neira Ayuso struct nft_object *obj, u32 portid, u32 seq, 10272599e989SPablo Neira Ayuso int event, int family, int report, gfp_t gfp); 10282599e989SPablo Neira Ayuso 1029e5009240SPablo Neira Ayuso /** 1030e5009240SPablo Neira Ayuso * struct nft_object_type - stateful object type 1031e5009240SPablo Neira Ayuso * 1032e5009240SPablo Neira Ayuso * @eval: stateful object evaluation function 1033e5009240SPablo Neira Ayuso * @list: list node in list of object types 1034e5009240SPablo Neira Ayuso * @type: stateful object numeric type 1035e5009240SPablo Neira Ayuso * @size: stateful object size 1036e5009240SPablo Neira Ayuso * @owner: module owner 1037e5009240SPablo Neira Ayuso * @maxattr: maximum netlink attribute 1038e5009240SPablo Neira Ayuso * @policy: netlink attribute policy 1039e5009240SPablo Neira Ayuso * @init: initialize object from netlink attributes 1040e5009240SPablo Neira Ayuso * @destroy: release existing stateful object 1041e5009240SPablo Neira Ayuso * @dump: netlink dump stateful object 1042e5009240SPablo Neira Ayuso */ 1043e5009240SPablo Neira Ayuso struct nft_object_type { 1044e5009240SPablo Neira Ayuso void (*eval)(struct nft_object *obj, 1045e5009240SPablo Neira Ayuso struct nft_regs *regs, 1046e5009240SPablo Neira Ayuso const struct nft_pktinfo *pkt); 1047e5009240SPablo Neira Ayuso struct list_head list; 1048e5009240SPablo Neira Ayuso u32 type; 1049e5009240SPablo Neira Ayuso unsigned int size; 1050e5009240SPablo Neira Ayuso unsigned int maxattr; 1051e5009240SPablo Neira Ayuso struct module *owner; 1052e5009240SPablo Neira Ayuso const struct nla_policy *policy; 105384fba055SFlorian Westphal int (*init)(const struct nft_ctx *ctx, 105484fba055SFlorian Westphal const struct nlattr *const tb[], 1055e5009240SPablo Neira Ayuso struct nft_object *obj); 1056e5009240SPablo Neira Ayuso void (*destroy)(struct nft_object *obj); 1057e5009240SPablo Neira Ayuso int (*dump)(struct sk_buff *skb, 105843da04a5SPablo Neira Ayuso struct nft_object *obj, 105943da04a5SPablo Neira Ayuso bool reset); 1060e5009240SPablo Neira Ayuso }; 1061e5009240SPablo Neira Ayuso 1062e5009240SPablo Neira Ayuso int nft_register_obj(struct nft_object_type *obj_type); 1063e5009240SPablo Neira Ayuso void nft_unregister_obj(struct nft_object_type *obj_type); 1064e5009240SPablo Neira Ayuso 1065e5009240SPablo Neira Ayuso /** 106633d5a7b1SFlorian Westphal * struct nft_traceinfo - nft tracing information and state 106733d5a7b1SFlorian Westphal * 106833d5a7b1SFlorian Westphal * @pkt: pktinfo currently processed 106933d5a7b1SFlorian Westphal * @basechain: base chain currently processed 107033d5a7b1SFlorian Westphal * @chain: chain currently processed 107133d5a7b1SFlorian Westphal * @rule: rule that was evaluated 107233d5a7b1SFlorian Westphal * @verdict: verdict given by rule 107333d5a7b1SFlorian Westphal * @type: event type (enum nft_trace_types) 107433d5a7b1SFlorian Westphal * @packet_dumped: packet headers sent in a previous traceinfo message 107533d5a7b1SFlorian Westphal * @trace: other struct members are initialised 107633d5a7b1SFlorian Westphal */ 107733d5a7b1SFlorian Westphal struct nft_traceinfo { 107833d5a7b1SFlorian Westphal const struct nft_pktinfo *pkt; 107933d5a7b1SFlorian Westphal const struct nft_base_chain *basechain; 108033d5a7b1SFlorian Westphal const struct nft_chain *chain; 108133d5a7b1SFlorian Westphal const struct nft_rule *rule; 108233d5a7b1SFlorian Westphal const struct nft_verdict *verdict; 108333d5a7b1SFlorian Westphal enum nft_trace_types type; 108433d5a7b1SFlorian Westphal bool packet_dumped; 108533d5a7b1SFlorian Westphal bool trace; 108633d5a7b1SFlorian Westphal }; 108733d5a7b1SFlorian Westphal 108833d5a7b1SFlorian Westphal void nft_trace_init(struct nft_traceinfo *info, const struct nft_pktinfo *pkt, 108933d5a7b1SFlorian Westphal const struct nft_verdict *verdict, 109033d5a7b1SFlorian Westphal const struct nft_chain *basechain); 109133d5a7b1SFlorian Westphal 109233d5a7b1SFlorian Westphal void nft_trace_notify(struct nft_traceinfo *info); 109333d5a7b1SFlorian Westphal 109467a8fc27SPatrick McHardy #define nft_dereference(p) \ 109567a8fc27SPatrick McHardy nfnl_dereference(p, NFNL_SUBSYS_NFTABLES) 109667a8fc27SPatrick McHardy 109796518518SPatrick McHardy #define MODULE_ALIAS_NFT_FAMILY(family) \ 109896518518SPatrick McHardy MODULE_ALIAS("nft-afinfo-" __stringify(family)) 109996518518SPatrick McHardy 11009370761cSPablo Neira Ayuso #define MODULE_ALIAS_NFT_CHAIN(family, name) \ 11019370761cSPablo Neira Ayuso MODULE_ALIAS("nft-chain-" __stringify(family) "-" name) 110296518518SPatrick McHardy 110364d46806SPatrick McHardy #define MODULE_ALIAS_NFT_AF_EXPR(family, name) \ 110464d46806SPatrick McHardy MODULE_ALIAS("nft-expr-" __stringify(family) "-" name) 110564d46806SPatrick McHardy 110696518518SPatrick McHardy #define MODULE_ALIAS_NFT_EXPR(name) \ 110796518518SPatrick McHardy MODULE_ALIAS("nft-expr-" name) 110896518518SPatrick McHardy 110920a69341SPatrick McHardy #define MODULE_ALIAS_NFT_SET() \ 111020a69341SPatrick McHardy MODULE_ALIAS("nft-set") 111120a69341SPatrick McHardy 1112e5009240SPablo Neira Ayuso #define MODULE_ALIAS_NFT_OBJ(type) \ 1113e5009240SPablo Neira Ayuso MODULE_ALIAS("nft-obj-" __stringify(type)) 1114e5009240SPablo Neira Ayuso 1115ea4bd995SPatrick McHardy /* 1116ea4bd995SPatrick McHardy * The gencursor defines two generations, the currently active and the 1117ea4bd995SPatrick McHardy * next one. Objects contain a bitmask of 2 bits specifying the generations 1118ea4bd995SPatrick McHardy * they're active in. A set bit means they're inactive in the generation 1119ea4bd995SPatrick McHardy * represented by that bit. 1120ea4bd995SPatrick McHardy * 1121ea4bd995SPatrick McHardy * New objects start out as inactive in the current and active in the 1122ea4bd995SPatrick McHardy * next generation. When committing the ruleset the bitmask is cleared, 1123ea4bd995SPatrick McHardy * meaning they're active in all generations. When removing an object, 1124ea4bd995SPatrick McHardy * it is set inactive in the next generation. After committing the ruleset, 1125ea4bd995SPatrick McHardy * the objects are removed. 1126ea4bd995SPatrick McHardy */ 1127ea4bd995SPatrick McHardy static inline unsigned int nft_gencursor_next(const struct net *net) 1128ea4bd995SPatrick McHardy { 1129ea4bd995SPatrick McHardy return net->nft.gencursor + 1 == 1 ? 1 : 0; 1130ea4bd995SPatrick McHardy } 1131ea4bd995SPatrick McHardy 1132ea4bd995SPatrick McHardy static inline u8 nft_genmask_next(const struct net *net) 1133ea4bd995SPatrick McHardy { 1134ea4bd995SPatrick McHardy return 1 << nft_gencursor_next(net); 1135ea4bd995SPatrick McHardy } 1136ea4bd995SPatrick McHardy 1137ea4bd995SPatrick McHardy static inline u8 nft_genmask_cur(const struct net *net) 1138ea4bd995SPatrick McHardy { 1139ea4bd995SPatrick McHardy /* Use ACCESS_ONCE() to prevent refetching the value for atomicity */ 1140ea4bd995SPatrick McHardy return 1 << ACCESS_ONCE(net->nft.gencursor); 1141ea4bd995SPatrick McHardy } 1142ea4bd995SPatrick McHardy 114322fe54d5SPatrick McHardy #define NFT_GENMASK_ANY ((1 << 0) | (1 << 1)) 114422fe54d5SPatrick McHardy 1145cc02e457SPatrick McHardy /* 1146889f7ee7SPablo Neira Ayuso * Generic transaction helpers 1147889f7ee7SPablo Neira Ayuso */ 1148889f7ee7SPablo Neira Ayuso 1149889f7ee7SPablo Neira Ayuso /* Check if this object is currently active. */ 1150889f7ee7SPablo Neira Ayuso #define nft_is_active(__net, __obj) \ 1151889f7ee7SPablo Neira Ayuso (((__obj)->genmask & nft_genmask_cur(__net)) == 0) 1152889f7ee7SPablo Neira Ayuso 1153889f7ee7SPablo Neira Ayuso /* Check if this object is active in the next generation. */ 1154889f7ee7SPablo Neira Ayuso #define nft_is_active_next(__net, __obj) \ 1155889f7ee7SPablo Neira Ayuso (((__obj)->genmask & nft_genmask_next(__net)) == 0) 1156889f7ee7SPablo Neira Ayuso 1157889f7ee7SPablo Neira Ayuso /* This object becomes active in the next generation. */ 1158889f7ee7SPablo Neira Ayuso #define nft_activate_next(__net, __obj) \ 1159889f7ee7SPablo Neira Ayuso (__obj)->genmask = nft_genmask_cur(__net) 1160889f7ee7SPablo Neira Ayuso 1161889f7ee7SPablo Neira Ayuso /* This object becomes inactive in the next generation. */ 1162889f7ee7SPablo Neira Ayuso #define nft_deactivate_next(__net, __obj) \ 1163889f7ee7SPablo Neira Ayuso (__obj)->genmask = nft_genmask_next(__net) 1164889f7ee7SPablo Neira Ayuso 1165889f7ee7SPablo Neira Ayuso /* After committing the ruleset, clear the stale generation bit. */ 1166889f7ee7SPablo Neira Ayuso #define nft_clear(__net, __obj) \ 1167889f7ee7SPablo Neira Ayuso (__obj)->genmask &= ~nft_genmask_next(__net) 1168f2a6d766SPablo Neira Ayuso #define nft_active_genmask(__obj, __genmask) \ 1169f2a6d766SPablo Neira Ayuso !((__obj)->genmask & __genmask) 1170889f7ee7SPablo Neira Ayuso 1171889f7ee7SPablo Neira Ayuso /* 1172cc02e457SPatrick McHardy * Set element transaction helpers 1173cc02e457SPatrick McHardy */ 1174cc02e457SPatrick McHardy 1175cc02e457SPatrick McHardy static inline bool nft_set_elem_active(const struct nft_set_ext *ext, 1176cc02e457SPatrick McHardy u8 genmask) 1177cc02e457SPatrick McHardy { 1178cc02e457SPatrick McHardy return !(ext->genmask & genmask); 1179cc02e457SPatrick McHardy } 1180cc02e457SPatrick McHardy 118142a55769SPablo Neira Ayuso static inline void nft_set_elem_change_active(const struct net *net, 118242a55769SPablo Neira Ayuso const struct nft_set *set, 1183cc02e457SPatrick McHardy struct nft_set_ext *ext) 1184cc02e457SPatrick McHardy { 118542a55769SPablo Neira Ayuso ext->genmask ^= nft_genmask_next(net); 1186cc02e457SPatrick McHardy } 1187cc02e457SPatrick McHardy 118869086658SPatrick McHardy /* 118969086658SPatrick McHardy * We use a free bit in the genmask field to indicate the element 119069086658SPatrick McHardy * is busy, meaning it is currently being processed either by 119169086658SPatrick McHardy * the netlink API or GC. 119269086658SPatrick McHardy * 119369086658SPatrick McHardy * Even though the genmask is only a single byte wide, this works 119469086658SPatrick McHardy * because the extension structure if fully constant once initialized, 119569086658SPatrick McHardy * so there are no non-atomic write accesses unless it is already 119669086658SPatrick McHardy * marked busy. 119769086658SPatrick McHardy */ 119869086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_MASK (1 << 2) 119969086658SPatrick McHardy 120069086658SPatrick McHardy #if defined(__LITTLE_ENDIAN_BITFIELD) 120169086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_BIT 2 120269086658SPatrick McHardy #elif defined(__BIG_ENDIAN_BITFIELD) 120369086658SPatrick McHardy #define NFT_SET_ELEM_BUSY_BIT (BITS_PER_LONG - BITS_PER_BYTE + 2) 120469086658SPatrick McHardy #else 120569086658SPatrick McHardy #error 120669086658SPatrick McHardy #endif 120769086658SPatrick McHardy 120869086658SPatrick McHardy static inline int nft_set_elem_mark_busy(struct nft_set_ext *ext) 120969086658SPatrick McHardy { 121069086658SPatrick McHardy unsigned long *word = (unsigned long *)ext; 121169086658SPatrick McHardy 121269086658SPatrick McHardy BUILD_BUG_ON(offsetof(struct nft_set_ext, genmask) != 0); 121369086658SPatrick McHardy return test_and_set_bit(NFT_SET_ELEM_BUSY_BIT, word); 121469086658SPatrick McHardy } 121569086658SPatrick McHardy 121669086658SPatrick McHardy static inline void nft_set_elem_clear_busy(struct nft_set_ext *ext) 121769086658SPatrick McHardy { 121869086658SPatrick McHardy unsigned long *word = (unsigned long *)ext; 121969086658SPatrick McHardy 122069086658SPatrick McHardy clear_bit(NFT_SET_ELEM_BUSY_BIT, word); 122169086658SPatrick McHardy } 122269086658SPatrick McHardy 12231a1e1a12SPatrick McHardy /** 12241a1e1a12SPatrick McHardy * struct nft_trans - nf_tables object update in transaction 12251a1e1a12SPatrick McHardy * 12261a1e1a12SPatrick McHardy * @list: used internally 12271a1e1a12SPatrick McHardy * @msg_type: message type 12281a1e1a12SPatrick McHardy * @ctx: transaction context 12291a1e1a12SPatrick McHardy * @data: internal information related to the transaction 12301a1e1a12SPatrick McHardy */ 12311a1e1a12SPatrick McHardy struct nft_trans { 12321a1e1a12SPatrick McHardy struct list_head list; 12331a1e1a12SPatrick McHardy int msg_type; 12341a1e1a12SPatrick McHardy struct nft_ctx ctx; 12351a1e1a12SPatrick McHardy char data[0]; 12361a1e1a12SPatrick McHardy }; 12371a1e1a12SPatrick McHardy 12381a1e1a12SPatrick McHardy struct nft_trans_rule { 12391a1e1a12SPatrick McHardy struct nft_rule *rule; 12401a94e38dSPablo Neira Ayuso u32 rule_id; 12411a1e1a12SPatrick McHardy }; 12421a1e1a12SPatrick McHardy 12431a1e1a12SPatrick McHardy #define nft_trans_rule(trans) \ 12441a1e1a12SPatrick McHardy (((struct nft_trans_rule *)trans->data)->rule) 12451a94e38dSPablo Neira Ayuso #define nft_trans_rule_id(trans) \ 12461a94e38dSPablo Neira Ayuso (((struct nft_trans_rule *)trans->data)->rule_id) 12471a1e1a12SPatrick McHardy 12481a1e1a12SPatrick McHardy struct nft_trans_set { 12491a1e1a12SPatrick McHardy struct nft_set *set; 12501a1e1a12SPatrick McHardy u32 set_id; 12511a1e1a12SPatrick McHardy }; 12521a1e1a12SPatrick McHardy 12531a1e1a12SPatrick McHardy #define nft_trans_set(trans) \ 12541a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set) 12551a1e1a12SPatrick McHardy #define nft_trans_set_id(trans) \ 12561a1e1a12SPatrick McHardy (((struct nft_trans_set *)trans->data)->set_id) 12571a1e1a12SPatrick McHardy 12581a1e1a12SPatrick McHardy struct nft_trans_chain { 12591a1e1a12SPatrick McHardy bool update; 12601a1e1a12SPatrick McHardy char name[NFT_CHAIN_MAXNAMELEN]; 12611a1e1a12SPatrick McHardy struct nft_stats __percpu *stats; 12621a1e1a12SPatrick McHardy u8 policy; 12631a1e1a12SPatrick McHardy }; 12641a1e1a12SPatrick McHardy 12651a1e1a12SPatrick McHardy #define nft_trans_chain_update(trans) \ 12661a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->update) 12671a1e1a12SPatrick McHardy #define nft_trans_chain_name(trans) \ 12681a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->name) 12691a1e1a12SPatrick McHardy #define nft_trans_chain_stats(trans) \ 12701a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->stats) 12711a1e1a12SPatrick McHardy #define nft_trans_chain_policy(trans) \ 12721a1e1a12SPatrick McHardy (((struct nft_trans_chain *)trans->data)->policy) 12731a1e1a12SPatrick McHardy 12741a1e1a12SPatrick McHardy struct nft_trans_table { 12751a1e1a12SPatrick McHardy bool update; 12761a1e1a12SPatrick McHardy bool enable; 12771a1e1a12SPatrick McHardy }; 12781a1e1a12SPatrick McHardy 12791a1e1a12SPatrick McHardy #define nft_trans_table_update(trans) \ 12801a1e1a12SPatrick McHardy (((struct nft_trans_table *)trans->data)->update) 12811a1e1a12SPatrick McHardy #define nft_trans_table_enable(trans) \ 12821a1e1a12SPatrick McHardy (((struct nft_trans_table *)trans->data)->enable) 12831a1e1a12SPatrick McHardy 12841a1e1a12SPatrick McHardy struct nft_trans_elem { 12851a1e1a12SPatrick McHardy struct nft_set *set; 12861a1e1a12SPatrick McHardy struct nft_set_elem elem; 12871a1e1a12SPatrick McHardy }; 12881a1e1a12SPatrick McHardy 12891a1e1a12SPatrick McHardy #define nft_trans_elem_set(trans) \ 12901a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->set) 12911a1e1a12SPatrick McHardy #define nft_trans_elem(trans) \ 12921a1e1a12SPatrick McHardy (((struct nft_trans_elem *)trans->data)->elem) 12931a1e1a12SPatrick McHardy 1294e5009240SPablo Neira Ayuso struct nft_trans_obj { 1295e5009240SPablo Neira Ayuso struct nft_object *obj; 1296e5009240SPablo Neira Ayuso }; 1297e5009240SPablo Neira Ayuso 1298e5009240SPablo Neira Ayuso #define nft_trans_obj(trans) \ 1299e5009240SPablo Neira Ayuso (((struct nft_trans_obj *)trans->data)->obj) 1300e5009240SPablo Neira Ayuso 130196518518SPatrick McHardy #endif /* _NET_NF_TABLES_H */ 1302